<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>

    <!-- <style>
        div {
            color: rgba(255,0,0,10%);
        }
    </style> -->
    <!-- <style>  
        div {
            border:3px dashed red;
            width:200px;
            height:100px;
            box-sizing: border-box;
        }
    </style> -->

    <!-- <style>
        div{
            width:200px;
            height:100px;
            border-top:5px solid red;
            border-bottom:10px dashed green;
            border-left:15px dotted blue;
            border-right:20px solid grey;
        }
    </style> -->

    <!-- <style>
        div {
            width:200px;
            height:100px;
            border:2px solid red;
            margin: 30px;
            margin:0 auto;
        }

    
    </style> -->

    <style>
        div {
            background-color:red;
            height:150px;
            display:flex;
            justify-content: space-around;
            align-items:space-around;
        }

        span {
            background-color:blue;
            width:100px;
            height:100px;
        }
    </style>
</head>
<body>

    <div>
        <span>1</span>
        <span>2</span>
        <span>3</span>
    </div>

    <div>
        <span>1</span>
        <span>2</span>
        <span>3</span>
    </div>

    <!-- <div>Hellow</div>

    <p>World</p> -->
</body>
</html>